JP2017166373A - Wind power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wind power generator having improved efficiency of installation work with blades of a split structure enabling transportation to a wind farm even with general transportation means.SOLUTION: A division block 20 is configured such that block pieces 21, 22, 23 are connected by using a timber-frame joint structure, the block piece configured such that each of blades 1 constituting a turbine blade is molded by composite resin material of fiber and the like such as fiber-reinforced plastic. The division block 20 is connected along a longitudinal direction of a blade body 10 by using the above timber-frame joint structure, and the whole surface of the connected division block 20 is covered with an outer cover of the fiber-reinforced plastic.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wind power generator, and more particularly to a wind power generator equipped with a horizontal axis rotary blade that is easy to construct and realizes low cost.

  Wind power generators, also called wind turbines or wind turbines, have become a powerful tool for generating renewable electrical energy. One type of wind power generator is composed of a windmill (wind turbine, wind turbine) that rotates a generator connected to the rotor shaft by attaching a propeller (rotary blade, also referred to simply as a blade) to a horizontal shaft (rotor shaft). There is. This wind turbine supports blades, hubs, and nacelles for receiving blades that rotate in response to wind (many of them are three), a hub that connects the base of the blades to a rotor shaft that connects to the generator, a nacelle that houses the generators, etc. At the same time, it is composed of a turbine tower (also simply referred to as a tower) that serves as a passage for power cables, sensor cables, telephone lines, control cables, and the like.

  Since wind power generators have better power generation efficiency as the blade length of the blades (wings, blades, propellers) is longer, the blades in recent years are becoming larger, and one blade length exceeding several tens of meters is also practical. It has become. Therefore, the rotating diameter of the blade will exceed 100 meters.

  The blade is a huge workpiece integrally holding an outer skin whose surface is a blade surface around a keel (main girder) extending from a base portion attached to the hub to a tip portion (wing tip). In order to transport such a large workpiece blade from a manufacturing plant to a wind farm (location of a wind power generator), there are restrictions on its transport path and transport vehicle. In order to eliminate this transport restriction, it is conceivable to install a blade manufacturing factory for each wind farm, but this is not practical.

  Examples of conventional techniques for eliminating such transport restrictions include Patent Document 1, Patent Document 2, and Patent Document 3. Patent Document 1 has a structure in which a blade whose surface is a blade surface is reinforced with a keel (main girder) and is divided into two for each main girder and carried to a wind farm, and the main girder is combined and integrated. Is disclosed. The joint between the outer shells opened at the joint portion of the main girder is sealed with a member for outer skin joining to eliminate the gap.

  In Patent Document 2, a blade provided with wings around the main girder is divided into two parts, the inner wing and the outer wing, to improve the transportability, and the main girder divided part has a fitting structure. Disclosed is a blade for fitting and fixing a split portion of a main beam via an adhesive. In Patent Document 3, a blade without a main beam (keel) formed of fiber reinforced resin (FRP) or the like is divided into three parts and transported to a wind farm, and a tubular joint member and bolts / nuts or rivets are used for the divided parts. Disclosed is a blade for joining together.

JP 2010-59884 A JP 2005-147086 A JP 2004-11616 A

  In the blades described in Patent Document 1 and Patent Document 2, a main girder (a keel) passes through the interior from the block base to the tip to ensure the strength in the longitudinal direction and reduce the occurrence of bending. In addition, although the main girder is not provided in the blade described in Patent Document 3, a joining member (joint) that bridges in the longitudinal direction of the blade is inserted into the connecting portion of the block, and a large number of bolts and nuts are provided. They are connected using fixed parts. In the above conventional techniques, the blades are transported in two or three parts. As for the size (length) after the division, as described in Patent Document 3, one length is set to about 20 meters. When the divided blades are mutually connected, that is, the blocks are mechanically connected to each other by a fixing member such as a bolt and a nut different from the blade structure, it is impossible to deny the occurrence of looseness or looseness over time. This also increases the cost of maintenance later.

  The fact that one divided length is about 20 meters is assumed to be transported by special vehicles such as special vehicles for long objects such as large trailer trucks. Arrangement is essential. In addition, a ship equipped with facilities capable of carefully handling long objects is also required for transport via the sea. It is clear that the divided blocks are the blades of a wind turbine generator even when shipped from the factory.

  In the construction and operation of this type of wind power generator, the installation costs of blades and towers account for a large percentage, and the cost of transportation from the side of the manufacturing plant to the location (wind farm) is reduced. This is a major factor in cost reduction. Also, the cost required for maintenance after construction is high. However, the blade structure of the above prior art requires the use of special vehicles and ships for its transportation, is heavy, and requires transportation by skilled workers in order to avoid cargo handling and breakage during transportation. The Therefore, transportation from the manufacturing plant to the wind farm is extremely difficult, and the cost for doing so is high, and solving these problems is one of the problems.

  An object of the present invention is to solve the above-described problems in the prior art, and by using a blade having a structure that enables transportation of a blade from a factory to a wind farm even with a general transportation means such as a small and medium-sized truck. It is to provide a wind power generator with improved installation work efficiency.

  In order to achieve the above object, the present invention is configured by a large number of divided blocks each composed of a combination of a plurality of basic constituent members (block pieces). For joining between block pieces and joining between divided blocks, fixing means of a wooden joint structure (old Japanese wood joint structure that does not use nails or reinforcement hardware) is adopted. In this wooden joint structure, two members are fixed to each other only by fitting the joint portions, and no dissimilar material members such as metal fittings are used. A large number of divided blocks are combined with a wooden joint structure to form one blade shape, and the surface is covered with fiber reinforced plastic (FRP) to form a skin, thereby obtaining a final blade. The blade having this structure does not require a main girder (so-called keel) as shown in Patent Document 1 or Patent Document 2, and does not require a joining part of different materials as shown in Patent Document 3. In addition, it is possible to firmly join the divided blocks, and a robust and lightweight blade can be obtained.

  The divided block constituting the blade of the present invention uses a resin block molded with a resin material, and the lighted steel plate or a lightweight metal plate such as aluminum or aluminum alloy is used to join the divided block block or lock piece with a wooden joint structure. You can also. And by itself, it is lightweight and formed by so-called FRP in which the following granulated fiber or cut short fiber is mixed as a filler, or is formed by so-called FRP in which fibers are laminated and impregnated with plastic. It can be a tough blade. Epoxy resin, unsaturated polyester resin, urea resin, melamine resin, phenol resin, vinyl chloride resin, etc. can be used as the resin for forming the above-mentioned divided blocks, and die-cutting (molding), injection molding (injection / It can be mass-produced by molding). And as FRP used for a division | segmentation block and an outer_layer | skin, the thing using a glass fiber (GFRP), the thing using a carbon fiber (CFRP), the thing using an alumina fiber (ALFRP), the thing using a silicon carbide fiber (SiCFRP) )and so on. The plastic is preferably a thermosetting resin that is preferably an epoxy resin. Furthermore, a polystyrene resin or a urethane resin can be molded or foamed with a foaming agent, and an epoxy or urethane paint can be applied thereto to reinforce the block piece itself and join the divided blocks.

  Further, the size of the divided block for constituting the blade or an intermediate product obtained by joining a plurality of divided blocks is a general limit value of a vehicle (width 2.5 m or less, length 12) stipulated by the Road Law. By making it a size that fits into the bed of a truck satisfying a height of 3.8 meters or less and a height of 3.8 meters or less), even ordinary trucks such as 4-ton trucks can be easily transported to a wind farm. And when manufacturing a joint structure that joins a plurality of blocks to form a unit block, the width and plane of each of the base part, the intermediate part, and the tip part of the blade are made by joining a plurality of different pieces having different shapes. The number of block pieces and the surface shape of the divided blocks are changed according to the cross-sectional shape.

  The above assembly can be carried out in the state of a block piece, or it can be assembled to a wind farm as an intermediate product after assembling one or more divided blocks at a core manufacturing factory, and final assembly can be performed at a simple assembly work place installed in the wind farm. You can also do it. A predetermined number (usually three) of the assembled blades are fixed to a hub, and installed at the top of the tower together with a generator and a nacelle to form a wind power generator.

A typical configuration of the present invention will be described as follows. That is,
(1) A wind power generator according to the present invention includes a horizontal shaft provided at the top of a tower, a turbine blade attached to one end of the horizontal shaft, and a generator connected to the other end of the horizontal shaft. It has a nacelle that houses power generation equipment,
The turbine blade is composed of a plurality of blades and a hub for fixing the plurality of blades to one end of the horizontal shaft,
Each of the blade bodies is formed of a resin material, and a divided block obtained by joining a block piece divided in the width direction of the blade and a leading edge block piece is made of the material itself constituting the blade along the longitudinal direction of the blade. It is characterized in that the entire surface of the blade body, which is formed by joining a large number of divided blocks joined together by joint means provided to the block piece in shape, is covered with a fiber reinforced plastic skin.
(2) The joint joint imparted to the block piece in the shape of the material constituting the blade according to (1) is a joint using a wooden joint structure.
(3) The means for joining a plurality of the divided blocks according to (1) in the longitudinal direction of the blade is the wooden joint structure.
(4) The block pieces and the divided blocks described in (2) or (3) are alternately joined in a staggered arrangement along the longitudinal direction of the blade.
(5) It is characterized by the above-mentioned in any one of (2) to (4). The wooden joint structure is provided by bridging the joint between the block pieces and the joint between the divided blocks. (6) Between the joint between the block pieces and the divided blocks according to (5) above. The above-mentioned wooden joint structure provided by bridging at the joint part is driven by the bridge material having the same material as the block piece and corresponding to the shape of the concave part in the concave part of the wooden joint structure formed on both sides of the joint part. It is connected by.
(7) The blade according to (1) includes a base portion, an intermediate portion, and a tip portion, and the shapes of the base portion, the intermediate portion, and the tip portion are different from each other according to the shape of the blade,
The number of block pieces constituting the base portion, the intermediate portion, and the tip portion is different.
(8) The block piece according to (1) has a shape and a shape corresponding to shapes of the base portion, the intermediate portion, and the tip portion of the blade.
(9) The block piece according to (1) is configured by bonding a front-side divided piece and a back-side divided piece.
(10) The present invention is characterized in that an adhesive is interposed between the front divided piece, the rear divided piece, the joint between the block pieces, and the joint between the divided blocks described in (9).
(11) The blade according to (1) is characterized in that it is curved in a gently convex shape in the rotational direction and gradually narrows along the tip from the base side.
(12) The blade according to (1) is characterized in that the width from the intermediate portion to the tip portion is the same.
(13) A rod-shaped grounding member is provided at the tip of the blade according to (1) above in a tangential direction of a rotation circle drawn by the tip of the blade.
(14) A grounding end plate having a predetermined angle with respect to a plane intersecting the rotation surface including a tangent of a rotation circle drawn by the tip of the blade is provided at the tip portion of the blade according to (1). It is characterized by having.
(15) The resin material constituting the blade body according to (1) is a carbon fiber reinforced plastic, and the fiber reinforced plastic constituting the outer skin is a glass fiber reinforced plastic.
(16) The resin material constituting the blade body according to (1) is a carbon fiber reinforced plastic.
(17) The resin material constituting the blade main body according to (1) is characterized in that it is a styrene resin, a urethane resin, or a composite material thereof having a reinforced coating film on its surface.
(18) The fiber reinforced plastic constituting the outer skin according to (16) or (17) is a glass fiber reinforced plastic.
(19) The fiber reinforced plastic constituting the outer skin according to (16) or (17) is a carbon fiber reinforced plastic.

  A composite resin material such as a fiber such as lightweight metal or fiber (carbon fiber) reinforced plastic is used as a material of the divided block constituting the blade according to the present invention, and the surface of the divided block integrated as a blade is a fiber (glass fiber or the like). The material is coated with a reinforced plastic skin, but the material is not limited to this as long as the material satisfies the required characteristics as a blade such as rigidity, toughness, and weather resistance. For example, a space-filling structure in a broad sense, typically a honeycomb structure used as a structural material for aircraft wings in recent years, can be employed.

  Other configurations of the present invention are not limited to the configurations described in the above-described configuration and the embodiments described later, and it goes without saying that various modifications can be made without departing from the technical idea of the present invention. Yes.

  The blade according to the present invention has a heavy weight penetrating from the root to the tip of the blade, which was considered indispensable to the conventional one, and a rigid main girder (penetrating material, so-called keel: keel) is no longer essential. Moreover, due to the use of a wooden joint structure, which is a traditional Japanese wood joining method, for connecting block pieces and divided blocks, it is caused by the concentration of strain on the joint generated by using different materials and the difference in expansion coefficient. It is possible to provide a wind turbine having a light weight and a long life. In consideration of the size and weight of the blade and the rotational speed when it is installed in the turbine, a reinforcing member such as a rope or belt that passes from the base to the tip of the blade is provided, and the centrifugal force caused by the rotation of the blade It is also possible to adopt a configuration that ensures sufficient tensile strength and shape maintenance to withstand.

  Further, since the blade according to the present invention can be assembled in a wind farm, there is no problem in transportation as in the past, and it can be assembled with simple equipment after being transported to the wind farm by a normal transportation means. Therefore, the manufacturing cost of the blade itself can be reduced, and the lifting work to the tower is easy, so that the installation cost of the wind power generator can be greatly reduced.

It is explanatory drawing of Example 1 of the braid | blade main body which comprises the wind turbine used for the wind power generator which concerns on this invention. FIG. 2 is an assembly diagram of an intermediate portion of a divided block constituting the blade body shown in FIG. 1. FIG. 6 is another assembly view of the base of the divided block that constitutes the blade body shown in FIG. 1. It is explanatory drawing of the surface treatment of a braid | blade shown in FIG. 1, and a junction part. FIG. 5 is a partial view illustrating a state where three blades are integrated with a hub and installed in a nacelle provided with a generator 60. It is a whole perspective view explaining Example 2 of a braid body which constitutes a wind turbine used for a wind power generator concerning the present invention. FIG. 7 is a six-side view illustrating the overall configuration of the blade body shown in FIG. 6. It is a rough assembly figure of the division | segmentation block which comprises the blade main body shown in FIG. It is explanatory drawing of the surface treatment of the braid | blade shown in FIG. FIG. 7 is a detailed assembly diagram illustrating a first example of split block joint common to the intermediate part and the tip part of the blade body shown in FIG. 6. FIG. 7 is a detailed assembly diagram illustrating a second example of split block joint common to the intermediate part and the tip part of the blade body shown in FIG. 6. FIG. 7 is a detailed assembly diagram for explaining a third example of split block joining common to the intermediate part and the tip part of the blade body shown in FIG. 6. FIG. 7 is a detailed assembly diagram for explaining a fourth example of split block joining common to the intermediate part and the tip part of the blade body shown in FIG. 6. It is a whole perspective view explaining Example 3 of a blade body which constitutes a wind turbine used for a wind power generator concerning the present invention. FIG. 15 is a detailed assembly diagram illustrating a first example of split block joint common to the intermediate part and the tip part of the blade body shown in FIG. 14. FIG. 15 is a detailed assembly diagram for explaining a second example of split block joint common to the intermediate part and the tip part of the blade body shown in FIG. 14. It is explanatory drawing of the whole shape of the wind power generator which concerns on this invention.

  FIG. 1 is an explanatory diagram of Embodiment 1 of a blade body constituting a wind turbine used in a wind power generator according to the present invention. 1A is the front surface (the side receiving the wind), FIG. 1B is the back surface, FIG. 1C is the front edge of FIG. 1A viewed from the direction of arrow F, and FIG. (E) shows a base plane when (a) is seen from the direction of arrow E, and (f) shows a tip plane when (b) is seen from the direction of arrow F.

  In FIG. 1, a blade body 10 according to the present embodiment is composed of a base part 11, an intermediate part 12, and a tip part 13, and the intermediate part 12 has a gentle convex shape in the rotational direction from the base part 11 side to the tip part. It is curved. A rod-shaped grounding member 30 that is gradually narrower along the tip from the base 11 side and protrudes in the tangential direction of the rotation circle drawn by the tip is provided at the tip 13. The blade body 10 is preferably formed of plastic, and is formed by joining a large number of divided blocks 20 joined together by a wooden joint structure along the longitudinal direction of the blade body 10. The entire surfaces of the joined divided blocks are covered with a fiber-reinforced plastic outer skin as described later.

  As shown in the drawing, the blade body 10 according to the present embodiment is gradually narrowed from the base portion 11 side toward the distal end portion 13 after the intermediate portion 12 is once widened from the base portion 11 side. As shown in FIG. 1 (e), the base 11 has a circular plane (also in cross section) when viewed from the hub 40 side, and a rotating shaft (not shown) via the hub 40 by a fixing means (not shown). ) (See FIG. 5). The intermediate portion 12 has a shape that gradually becomes flat from the base portion and reaches the distal end portion 13.

  The base part 11, the intermediate part 12, and the tip part 13 are all configured by joining the divided blocks 20. Each of the divided blocks 20 and the plurality of block pieces divided in the state of being separated in the width direction of the blade body 10 are integrally joined together using an ancient Japanese wooden joint structure described later. The shapes of the base part 11, the intermediate part 12, and the tip part 13 of the blade body 10 differ depending on the shape of the blade body. In the present embodiment, the cross-sectional shape and size gradually change along the curve that forms the gentle convex shape described above. Further, the number of block pieces constituting the base part 11, the intermediate part 12 and the tip part 13 is different. In this embodiment, the base part 11 and the intermediate part 12 are composed of three block pieces, and the tip part 13 is composed of two block pieces. It consists of Further, the number of block pieces constituting the divided blocks of each part is not limited to the illustrated one.

  As described above, the protruding end of the distal end portion 1 is provided with the rod-shaped grounding member 30. This rod-shaped grounding member 30 is preferably made of a low electrical resistance material such as aluminum or copper, passes through the inside of the blade body 10, and passes through the ground wire (not shown) from the hub 40 through the tower 100 (see FIG. 14). Released to the ground. This rod-shaped grounding member 30 is a means for avoiding accumulation of static electricity caused by friction between the blade 1 and air, or destruction of the blade and generator equipment due to lightning current. The grounding wire of the rod-like grounding member 30 is made of a conductive material as a reinforcing member for resisting the centrifugal force accompanying the rotation described above, and it is also possible to share both the reinforcing function of the blade and the function of the grounding wire. is there. Known means such as a discharge gap and a slip ring can be used for ground current connection between the rotating blade portion (hub portion, rotating shaft portion, etc.) and the fixed portion (tower, etc.).

  FIG. 2 is an assembly view of an intermediate portion of the divided block constituting the blade body shown in FIG. The following joining uses the above-mentioned traditional Japanese joint structure of wood, and the notation of the concave part and the convex part is so-called dovetail, in which the shape of at least two parallel surfaces becomes wider toward the back. (It may be a sickle joint or the like). The divided block 20 constituting the intermediate portion 12 includes a leading edge block piece 21, an intermediate block piece 22, and a trailing edge block piece 23. Each block piece has front edge lateral walls 21W1, 22W1, 23W1 on one adjacent edge thereof. The front edge block piece 21 has a front edge vertical wall 21W2 on the side adjacent to the intermediate block piece 22. A front edge block vertical concave block 21ALF is formed in the front edge horizontal wall 21W1 inside the front edge block piece 21, and the rear surface of the front edge block piece 21 is fitted with a vertical recess of the front edge block piece adjacent to the longitudinal direction of the blade body. The edge block vertical direction convex part 21ALM is formed. Further, a front edge block width direction concave portion 21AWF is formed on the back surface of the front edge vertical wall 21W2, and an intermediate block width direction convex portion 22AWM protruding from the intermediate front vertical wall 22W21 of the intermediate block piece 22 is fitted. It comes to match.

  The intermediate block piece 22 includes an intermediate front vertical wall 22W21 on the side facing the front edge vertical wall 21W2 of the front edge block piece and an intermediate rear vertical wall 22W22 on the side facing the rear edge block piece 23. The intermediate block piece 22 is also formed with an intermediate block longitudinal recess 22ALF and an intermediate block width recess 22AWF similar to the leading edge block piece, and the intermediate block piece and the trailing edge block piece 23 adjacent to each other in the longitudinal direction of the blade body. The rear edge block width direction convex portion 23AWM is fitted.

  A rear end vertical wall 23W3 is provided on the side of the rear edge block piece 23 facing the intermediate block piece 22. The first trailing edge block vertical recess 23ALF1 is adapted to fit with the first trailing edge block vertical protrusion 23ALM1 of the adjacent trailing edge block piece. Similarly, the second trailing edge block vertical recess 23ALF2 is adapted to fit with the second trailing edge block vertical protrusion 23ALM2 of the adjacent trailing edge block piece.

  The leading edge block piece 21, the intermediate block piece 22, and the trailing edge block piece 23 form the integral divided block 20 by fitting the above-described concave portions and corresponding convex portions with each other. This is continuously connected in the longitudinal direction of the blade body to form one blade. The base portion 11 is assembled in the same manner as the intermediate portion and the tip portion, and the portion 11-intermediate portion-tip portion is basically formed by assembling with the same dovetail except that the outer diameter shape is different. These dovetail joints have a shape of the above-mentioned dovetail, more specifically, a joint structure called “seat dovetail”. The base portion 11 is assembled in the same manner as the intermediate portion and the tip portion, but the connection portion with the hub is fixed by this dovetail joint or other base joining means. Then, the blade body shown in FIG. 1 is formed by joining the tip portion 13 to the other end of the intermediate portion (the outer skin is not shown).

  FIG. 3 is an assembly diagram illustrating another configuration of the base of the divided block constituting the blade body shown in FIG. As shown in FIG. 5A, the base 11 is composed of a hub joining block first piece 11P1, a hub joining block second piece 11P2, and a hub joining block third piece 11P3. Each of these pieces has a plurality of rod-shaped projections, and as shown by the arrows in FIG. 3A, one of the rod-shaped projections (plurality) is placed in the gap between the other castle projections (plurality). The hub joint block as shown in FIG. In this joining example, a fitting joint shape is not required at the end portion (root) of the intermediate portion 12 to be joined to the base portion at the half protruding portion of the base portion shown in FIG. This joining is known as a LEGO (registered trademark) block, uses a joining structure, is alternately staggered with the block piece to be joined, and is bridged in a staggered manner. FIG. 3B is a view of the state after assembling FIG. 3A as seen from the diagonally left direction of FIG. One end (root) of the intermediate portion 12 described above is joined to the base portion 11 thus configured. The joining portion (root) of the intermediate portion 12 is provided with a shape that fits into the half protruding portion shown in FIG.

  4A and 4B are explanatory views of the surface treatment and the joint portion of the blade body shown in FIG. 1, wherein FIG. 4A shows a state where the blade body is formed, and FIG. A fiber reinforced plastic skin 15 is provided to cover the outer surface of the blade body 10 obtained by the above-described procedure. FIG. 4C is a partial cross-sectional view of a part of FIG. 4B, in which the divided block 20 (n) and the adjacent divided block 20 (n−1) are joined by the above-described procedure. An adhesive 16 is interposed between adjacent divided blocks.

  As shown in FIG. 2C, the fiber reinforced plastic outer skin 15 is newly filled so as to be continuous with the adhesive interposed between the divided blocks by filling the boundary (surface depression) of the connected divided blocks. The process of applying the adhesive 16 and winding or pasting the fiber cloth (sheet woven with glass fiber or carbon fiber) 17 thereon is repeated. Alternatively, the step of applying the adhesive 16 after the fiber cloth 17 is wound around the blade body is repeatedly executed by a predetermined repetition so that the entire blade body is covered with a fiber reinforced plastic skin (so-called FRP molding). The number of repetitions (the number of fibers 17 and adhesive layers stacked) is determined by various conditions such as the material of the divided blocks, the wind condition of the wind generator installation location (wind farm), the blade size, and the climate. The adhesive 16 interposed between the divided block 20 (n) and the adjacent divided block 20 (n-1) and the adhesive for FRP molding are fused with each other by the above-described process, and the adhesive is strong between the divided blocks. Demonstrate the bonding effect.

  There is also a method of adhering to the blade body in a state where glass fiber or carbon fiber is mixed or infiltrated with plastic. In this embodiment, the blade body, which is a base material (matrix), is molded with an epoxy resin, a polyamide resin, a phenol resin, an aramid resin, an unsaturated polyester resin, a styrene resin or a foamed polystyrene resin, a urethane resin, or a urethane foam resin. Then, a fiber such as glass fiber or carbon fiber was formed into a sheet shape, and was applied to the blade body for adhesion or winding and strengthening. As a result, the blade surface also becomes a uniform surface, and has the appearance of being formed of a single material.

  In this way, a lightweight and strong blade can be obtained without requiring a main girder such as a heavy keel by applying FRP treatment to a connecting structure using a wooden joint structure of many divided blocks. Can do. As shown in FIG. 5, this is attached to the hub 40 connected to the generator 60 and set on the top of the tower 100. FIG. 5 is a partial view illustrating a state in which three blades are integrated with the hub 40 and installed in the nacelle 50 including the generator 60.

  By using the blade described in the second embodiment, it is possible to easily obtain a blade having a structure capable of transporting the blade from the factory to the wind farm even with a general transportation means such as a small and medium-sized truck. Installation work can be made more efficient, and the installation cost as well as the maintenance cost can be reduced, and a wind power generator capable of efficient operation can be provided.

  FIG. 6 is an overall perspective view for explaining Example 2 of the blade body constituting the wind turbine used in the wind power generator according to the present invention. FIG. 7 is a six-sided view for explaining the overall configuration of the blade body shown in FIG. 6 and does not show the boundaries of the divided blocks. The blade body 10 of the present embodiment includes a base portion 11 that is a portion that is fixed to the hub, an intermediate portion 12 that is a main portion of the blade, and a tip portion 13 as in the first embodiment.

  The blade main body of the present embodiment has substantially the same width from the intermediate portion 12 to the tip portion 13, and the tip portion 13 includes a tangent to the outer circumference of the rotation circle of the blade and has a predetermined width relative to the plane intersecting the rotation surface. A grounding end plate 14 having an angle is provided. However, the present invention can be similarly applied to a block in which the width from the intermediate portion 12 to the tip portion 13 is gradually changed (narrow or wide). 7A is the front surface (surface receiving the wind), FIG. 7B is the front edge of the same (a) (front end edge in the rotational direction), and FIG. 7C is the rear edge of the same (a) (rear in the rotational direction). (Edge), (d) is the back surface of (a), (e) is the tip plane when (a) is viewed from the X direction, (f) is (a) when viewed from the Y direction. The base plane is shown.

  FIG. 8 is a schematic assembly diagram of the divided blocks constituting the blade body shown in FIG. The base portion 11 shown in FIG. 8 includes a hub joint block portion 11A and a joint block (hub-intermediate transition block) 11B between the hub and the intermediate portion 12. Note that most of the divided blocks between the intermediate portion 12 and the tip portion 13 are not shown. As can be seen from FIG. 8, the blade body 10 of the present embodiment is configured so that the intermediate portion 12 and the tip portion 13 have substantially the same shape except for the base portion 11 and the portion of the joining block 11 </ b> B that moves from the base portion 11 to the intermediate portion 12. It is composed of divided blocks. In the present embodiment, the intermediate block 12 and the tip block 13 are constituted by three block pieces.

  FIG. 9 is an explanatory diagram of the surface treatment of the blade shown in FIG. FIG. 9A shows a blade body 10 configured by combining divided blocks. A grounding end plate 14 is provided on the tip blade. FIG. 2B shows a state in which the outer skin 15 is formed. A state is shown in which a blade 1 is formed by providing a fiber-reinforced plastic skin 15 covering the outer surface of the blade body 10 obtained by joining the divided blocks. The outer skin 15 is formed by the same material and procedure as in the first embodiment. Although not shown, an adhesive is interposed in the connecting part (joining part) of the divided blocks.

  In the same manner as in Example 1, a new adhesive was applied so that the boundary (surface dent) of the connected divided blocks was filled, and the adhesive intervening between the divided blocks was also fused and continued. Repeat the fixing with the fiber cloth (woven cloth) wrapped around. The number of repetitions (the number of fibers 17 and adhesive layers stacked) is determined by various conditions such as the material of the divided blocks, the wind condition of the wind generator installation location (wind farm), the blade size, and the climate.

  Alternatively, glass fiber or carbon fiber may be applied to the blade body while being mixed or infiltrated with plastic. Also in this embodiment, the blade body as a base material (matrix) is applied to epoxy resin, polyamide resin, phenol resin, aramid resin, unsaturated polyester resin, styrene resin or styrene resin, or pronunciation urethane resin or urethane resin. It was formed by applying a film and surface-strengthening treatment, and a sheet of fiber such as glass fiber or carbon fiber was attached to the blade body or wound to form a jacket. As a result, the blade surface becomes smooth and has the appearance of being formed of a single material.

  In this way, a light and strong blade can be obtained without the need for a main girder such as a keel by applying FRP treatment to the outer surface as a joint connection structure using a technique of a wooden joint structure, with a large number of divided blocks. Can be obtained. As in the first embodiment, this is attached to the hub 40 connected to the generator 60 and set on the top of the tower as shown in FIG.

  By using the blade body assembly structure using the divided blocks described in the second embodiment, the blade can be transported from the factory to the wind farm by a general transportation means such as a small and medium truck as in the first embodiment. The blade having the structure as described above can be easily obtained. Further, the installation work of the wind power generator can be made more efficient, so that not only the installation cost but also the maintenance cost can be reduced, and a wind power generator capable of efficient operation can be provided.

  FIG. 10 is a detailed assembly diagram illustrating a first example of split block joint common to the intermediate portion and the tip portion of the blade body shown in FIG. 6. This divided block includes a front edge block piece 21, an intermediate block piece 22, and a rear end block piece 23. FIG. 10 shows how two adjacent sets of divided blocks are assembled. The front edge block piece 21, the intermediate block piece 22, and the rear end block piece 23 have a hollow structure.

  The front edge block piece 21 has a plurality of front edge block vertical shafts 21BLM at the circumferential end along the longitudinal direction of the blade, and a plurality of front edge block vertical shaft receiving holes 21BLF are provided at the opposite circumferential end. Yes. And the front edge block width direction recessed part 21BWF is formed in the outer surface facing the intermediate | middle block piece 22. FIG. An intermediate block width direction convex portion 22BWM provided on a surface of the intermediate block piece 22 facing the front edge block piece 21 is fitted into the front edge block width direction concave portion 21BWF.

  The front edge block vertical shaft 21BLM of the front edge block piece 21 is fitted to the front edge block vertical shaft 21BLF of the adjacent front edge block piece 21. A circumferential groove is formed in the front edge block vertical shaft 21BLM, and an adhesive is interposed between the front edge block vertical shaft 21BLF and the front edge block vertical shaft 21BLM can be firmly coupled.

  Similarly, similarly to the above, the intermediate block piece 22 has a plurality of leading edge block longitudinal shafts 22BLM at the circumferential end along the blade longitudinal direction, and a plurality of leading edges at the opposite circumferential end. A block longitudinal shaft receiving hole 22BLF is provided. An intermediate block width direction recess 22BWF is formed on the outer surface facing the trailing edge block piece 23. A support block piece width direction convex portion 23BWM provided on a surface of the rear edge block piece 23 facing the intermediate block piece 22 is fitted into the front edge block width direction concave portion 22BWF with a wooden joint structure.

  The intermediate block longitudinal shaft 22BLM of the intermediate block piece 22 meshes with the intermediate block vertical shaft 22BLF of the adjacent intermediate block piece 22. A circumferential groove is also formed in the intermediate block longitudinal shaft 22BLM, and an adhesive is interposed between the intermediate block longitudinal shaft receiver 22BLF and the intermediate block longitudinal shaft 22BLM can be firmly coupled.

  The trailing edge block piece 23 is also provided with a plurality of trailing edge block longitudinal shafts 23BLM, and is fitted to the trailing edge block longitudinal shaft receiving hole 23BLF adjacent to the trailing edge block piece 23. The edge block piece 21, the intermediate block piece 22, and the trailing edge block piece 23 can be formed of an appropriate plastic material suitable for FRP, but a high-strength thin steel plate or a metal material such as aluminum or aluminum alloy can also be used. is there.

  The leading edge block piece 21, the intermediate block piece 22, and the trailing edge block piece 23 configured as described above are assembled as shown by the arrows in FIG. Thereby, the divided block 20 is assembled. By covering the surface of the blade body thus assembled with the above-described fiber-reinforced plastic skin, a lightweight and highly rigid blade can be obtained.

  FIG. 11 is a detailed assembly diagram for explaining a second example of split block joint common to the intermediate part and the tip part of the blade body shown in FIG. 6. In the second example shown in FIG. 11, the divided blocks constituting the blade body are joined to block pieces formed of a lump (bulk material) of plastic material to form divided blocks, which are further joined together to form the blade body. To do.

  FIG. 11A shows a state in which the leading edge block piece 21, the intermediate block piece 22 and the trailing edge block piece 23 are joined to form an integrated divided block 20. The figure (b) is the figure seen from the diagonally upper part by the side of the trailing edge block piece explaining the joining process of the leading edge block piece 21, the intermediate | middle block piece 22, and the trailing edge block piece 23, The figure (c) is also the leading edge. The figure seen from the diagonally upper part by the side of the front edge block piece explaining the joining process of the block piece 21, the intermediate | middle block piece 22, and the trailing edge block piece 23, The figure (d) extracts and shows the junction part of each block piece. FIG.

  This division block assembly example uses a joining structure (mutual fitting means) of Lego blocks (Lego is a registered trademark) known for block assembly toys and the like. That is, the wall surface of the front edge block piece 21 facing the intermediate block piece 22 has a front edge block width direction shaft receiving hole 21BWF, and the intermediate block piece on the wall surface of the intermediate block piece 22 facing the front edge block piece 21. It joins with the width direction shaft 22BWM. Further, the front edge block piece 21BLF, which is provided on the wall surface in the blade longitudinal direction of the front edge block piece adjacent in the longitudinal direction, is joined to the wall surface in the blade longitudinal direction of the front edge block piece 21 in the blade longitudinal direction. A piece longitudinal shaft 21BLM is formed.

  The wall surface facing the rear edge block piece 23 of the intermediate block piece 22 has an intermediate block piece width direction shaft receiving hole 22BWF, and the rear edge block piece on the wall surface of the rear edge block piece 23 facing the intermediate block piece 22 It unites with the transverse shaft 23BWF. Moreover, the intermediate block piece longitudinal shaft that is combined with the intermediate block piece longitudinal shaft receiving hole 22BLF on the wall surface in the blade longitudinal direction of the intermediate block piece adjacent to the longitudinal direction is formed on the wall surface in the blade longitudinal direction of the intermediate block piece 22 22BLM is formed.

  On the wall surface in the blade longitudinal direction of the trailing edge block piece 23, the longitudinal direction of the trailing edge block piece merged with the intermediate block piece longitudinal shaft receiving hole 23BLF on the wall surface in the blade longitudinal direction of the trailing edge block piece adjacent in the longitudinal direction. A shaft 23BLM is formed. FIG. 11 (d) is a partial view showing the joint portion of each block piece, and is fitted into the longitudinal shaft receiving hole 21 BLF of the front edge block piece 21 adjacent to the longitudinal shaft 21 BLM of the front edge block piece 21. The combined state is shown, in which the longitudinal shaft 21BLM of the adjacent front edge block piece 21 is viewed from the longitudinal shaft receiving hole 21BLF side of the front edge block piece 21.

  In addition, a reliable and strong joining and toughness as a blade can be ensured by interposing an adhesive in the gaps between the block pieces including the above-mentioned joining portions and the gaps between the divided blocks. By using the mutual fitting means described in FIG. 11 for joining the block piece and the divided block, the blade can be assembled quickly.

  FIG. 12 is a detailed assembly diagram for explaining a third example of the divided block joint common to the intermediate part and the tip part of the blade body shown in FIG. 6. In the third example of the divided block joint, as shown in FIG. 12A, the divided block 20 (n) and the divided block 20 (n + 1) are divided into the divided block upper half 20a ( n) and 20a (n + 1) and divided block lower half 20b (n) and 20b (n + 1). Each divided block is composed of a half leading edge block piece, an intermediate block piece, and a trailing edge block piece. In order to avoid complexity, these block pieces are omitted from the reference numerals. The divided block upper halves 20a (n), (n + 1) and the divided block lower halves 20b, 20b (n + 1) are bonded together with an adhesive 26.

  (B) of FIG. 12 shows each adjacent block piece constituting the divided block upper halves 20a (n) and 20a (n + 1) and the divided block lower halves 20b (n) and 20b (n + 1) bonded as described above. A bridging groove 24 is formed across the boundary line. The shape of the bridging groove 24 in this example is a drum shape in which one corner portion of two triangles face each other. Adjacent block pieces are connected by driving a bridging element 25 shaped to fit into the bridging groove 24 into the bridging groove 24. FIG. 12 (c) shows the state of two adjacent divided blocks 20 (n) and divided blocks 20 (n + 1) thus completed.

  The shape of the bridging groove 24 and the bridging element 25 straddling each adjacent boundary line of the block piece is not limited to the above-described hourglass shape, and the connection between both is resisted against pulling at the boundary such as a gourd shape. Any shape can be used. It is desirable that an adhesive is interposed also in the bridging groove 24 and the bridging element 25. The divided block upper half 20a (n), 20a (n + 1) and the divided block lower half 20b (n), 20b (n + 1) are bonded together, and the connection by the bridging groove 24 and the bridging element 25 is performed in the order described above. It is not limited. Including the above example, (n) and (n + 1) indicate two arbitrary divided blocks of the blade body. Further, “upper” and “lower” in the upper half of the divided block and the lower half of the divided block are descriptions for convenience of explanation, and one means one surface of the blade and the other means the opposite surface.

  FIG. 13 is a detailed assembly diagram illustrating a fourth example of split block joint common to the intermediate portion and the tip portion of the blade body shown in FIG. 6. In this assembly example, the divided blocks 20 (n) and 20 (n + 1) adjacent in the longitudinal direction (longitudinal direction) of the blade have the leading edge block piece 21, the intermediate block piece 22 and the trailing edge block piece 23 as in FIG. It is hollow. In this example, a plurality of vertical shafts 21BLM are formed to protrude from one of the peripheral edges of each block piece facing each other in the blade vertical direction. And the front edge block vertical direction shaft receiving hole 21BLF which receives the said block vertical direction shaft 21BLM of an adjacent block piece is provided. The intermediate block piece 22 and the rear end block piece 23 are each provided with a plurality of similar longitudinal shafts and block longitudinal shaft receiving holes, which are joined in the same manner as described above, but will not be described.

  On the inner side of the core piece of the wall surface where the leading edge block piece 21 and the intermediate block piece 22 are opposed to each other in the width direction, concave grooves (dents) 27 dug in the longitudinal direction are provided. One H-shaped U-shaped portion of the H-shaped bridging member 28 is inserted into the concave groove 27 with the both walls of the front edge block piece and the intermediate block piece interposed therebetween and joined. The other U-shaped portion of the H-shape is inserted into the concave groove 27 similar to the above adjacent in the blade vertical direction. The intermediate block piece 22 and the rear end block piece 23 are also provided with similar concave grooves and are joined by the same H-shaped bridging member as described above. Since the joining of the intermediate block piece 22 and the rear end block piece 23 is the same as that of the leading edge block piece 21 and the intermediate block piece 22, the description thereof is omitted.

  It is preferable to interpose an adhesive on the joining surfaces (opposing wall surfaces) of the leading edge block piece 21, the intermediate block piece 22, and the trailing edge piece 23.

  By using the above-described joining, a single blade body can be formed by a large number of divided block pieces. Then, by covering the surface of the blade body with the outer cover of the FRP described in each of the above embodiments, a lightweight, tough and highly rigid blade can be obtained.

  FIG. 14 is an overall perspective view for explaining Example 3 of the blade body constituting the wind turbine used in the wind power generator according to the present invention. The blade body 10 of the present embodiment includes a base portion 11 that is a portion that is fixed to the hub, an intermediate portion 12 that is a main portion of the blade, and a tip portion 13 as in the second embodiment. An installation end plate 14 is attached to the tip.

  The blade body 10 of the present embodiment has the same width from the intermediate portion 12 to the tip portion 13, and the tip portion 13 includes a tangent to the outer periphery of the rotation circle of the blade and has a predetermined width relative to the plane intersecting the rotation surface. A grounding end plate 14 having an angle is provided. The ground end plate 14 is made of a conductive material, preferably a metal, and is grounded to the base of the tower through a conductor (not shown) bridged from the tip 13 of the blade body 10 to the base 11. The grounding end plate 14 also has a function of suppressing blade tip vortex generated at the tip portion 13 (blade tip) and reducing blade vibration and drag increase.

  The intermediate block 12 and the front end 13 of the blade body 10 of this embodiment are configured by joining a leading edge block piece 21, an intermediate block piece 22, and a trailing edge block piece 23 in a staggered manner. The staggered joining means that the leading edge block piece 21, the intermediate block piece 22, and the trailing edge block piece 23 are joined so as to alternately bridge in the width direction of the blade body.

  FIG. 15 is a detailed assembly diagram illustrating a first example of split block joint common to the intermediate portion and the tip portion of the blade body shown in FIG. 14. This first example is similar to the assembly composition of the divided block joining of the second embodiment described in FIG. 11 above, and the divided blocks constituting the blade body are joined with block pieces formed of a lump (bulk material) of plastic material. It is. These are joined alternately in the blade length direction (longitudinal direction) to form a blade body.

  (A) of FIG. 15 is the figure which looked at the state which joined the front edge block piece 21, the intermediate | middle block piece 22, and the rear edge block piece 23 into the integral division | segmentation block 20 from the diagonally upper side by the front edge block piece side. . FIG. 4B is a view seen from an obliquely upper side on the front edge block piece side for explaining the joining process of the front edge block piece 21, the intermediate block piece 22 and the rear edge block piece 23.

  In the first example of the present embodiment, two front edge block pieces 21 (n) and 21 (n + 1) adjacent to each other in the longitudinal direction of the blade have three intermediate block pieces 22 (n) and 21 (n + 1) and 21. (N + 2) are joined in a staggered pattern. Further, two trailing edge block pieces 23 (n) and 23 (n + 1) are bridged in a zigzag manner to the intermediate block pieces 22 (n), 21 (n + 1) and 21 (n + 2), as shown in FIG. Join as shown. A large number of the blocks of the divided blocks joined in this way are connected in the longitudinal direction of the blade main body to form a blade main body 10 having a length from the base 11 in FIG. 14 to the joint with the grounding end plate 14 at the tip.

  Similar to the above-described embodiment, for the assembly of the divided blocks in this example, a joining structure (a mutual fitting means) of LEGO blocks (LEGO is a registered name) known for block assembly toys and the like is used. For example, the front edge block width direction shaft receiving holes 21BWF1 and 21BWF2 are provided on the wall surface of the front edge block piece 21 (n) facing the intermediate block pieces 22 (n) and 21 (n + 1). Intermediate block piece width direction shafts 22BWM1 and 22BWM2 are formed on the wall surface of the intermediate block piece 22 (n) facing the leading edge block piece 21 (n), and the leading edge block piece width direction shaft 21BWF1 and the intermediate block piece width direction are formed. The shaft 22BWM2 is joined.

  Further, intermediate block piece width direction shafts 22BWM1 and 22BWM2 are formed on the wall surface of the intermediate block piece 22 (n + 1) facing the front edge block piece 21 (n), and the front edge block piece width direction shaft 21BWF2 and the intermediate block piece are formed. The width direction shaft 22BWM1 is joined.

  Then, the blade longitudinal wall surface of the leading edge block piece 21 (n + 1) is united with the leading edge block piece longitudinal shaft receiving hole 21BLF on the blade longitudinal wall surface of the leading edge block piece adjacent in the longitudinal direction. A leading edge block piece longitudinal shaft 21BLM is formed.

  The wall surface facing the trailing edge block piece 23 (n) of the intermediate block piece 22 (n) has intermediate block piece width direction shaft receiving holes 22BWF1 and 22BWF2, and the intermediate block piece 22 (n ) And the trailing edge block piece lateral shafts 23BWM1 and 23BWM2 on the wall surface facing each other, and 23BWM1 and the intermediate block piece width direction shaft receiving hole 22BWF2 are joined.

  The intermediate wall piece 22 (n + 1) has a wall surface in the longitudinal direction of the blade that is joined with the intermediate block piece longitudinal shaft receiving hole 22BLF on the wall surface in the longitudinal direction of the blade of the intermediate block piece 22 (n) adjacent to the longitudinal direction. A block piece longitudinal shaft 22BLM is formed.

  The wall surface of the trailing edge block piece 23 (n + 1) in the longitudinal direction of the blade is combined with the intermediate block piece longitudinal shaft receiving hole 23BLF on the wall surface of the trailing edge block piece 23 (n) adjacent to the longitudinal direction in the blade longitudinal direction. A trailing edge block piece longitudinal shaft 23BLM is formed.

  In FIG. 15, the shaft and the shaft receiving hole are illustrated only in the portions necessary for the description, but the shaft and the shaft receiving hole similar to the described portion are formed in all the block pieces.

  A lump as shown in FIG. 15A in which the block pieces are joined as described above is joined in the longitudinal direction of the blade body to form an intermediate portion 12 and a tip portion 13, which are joined to the base portion 11 and the tip portion. A grounding end plate 14 is attached to 13 to obtain the blade body 10.

  In addition, a reliable and strong joining and toughness as a blade can be ensured by interposing an adhesive in the gap between the block pieces including the above-described joining portions. By using the staggered joining means described in FIG. 15 for joining the block piece and the divided block, the blade can be assembled quickly.

  FIG. 16 is a detailed assembly diagram for explaining a second example of split block joint common to the intermediate part and the tip part of the blade body shown in FIG. 14. FIG. 16A shows a state where two divided blocks are joined, and FIG. 16B shows a state where block pieces are joined to form one divided block. FIG. 6C is a diagram for explaining a process of joining the front edge block piece, the intermediate block piece, and the rear edge block piece as divided blocks.

  In FIG. 16C, the front edge block piece 21 has a front edge block width direction upper concave portion 21CWF on the side facing the intermediate block piece 22. Further, a front edge block width direction downward convex portion 21CWM is formed at an end of the seating step portion 21CWS protruding in the direction of the intermediate block piece 22 on the intermediate block piece side. And in one side of the longitudinal direction side surface of the front edge block piece 21, the width direction upper bank 21CLB1 and the width direction lower bank 21CLB2 extended in the width direction are formed. Furthermore, the width direction upper bank 21CLD1 and the width direction lower bank 21CLD2 which are extended in the width direction are formed in the other of the vertical side surface of the front edge block piece 21. As shown in FIG.

  An intermediate block width direction upward convex portion 22CWM1 is provided on the side of the intermediate block piece 22 facing the front edge block piece 21. Further, the front edge block width direction downward convex portion 21CWM of the front edge block piece 21 is inserted into the reverse seat step portion (not shown) of the front edge block piece 21 which is retracted so as to mesh with the seat step portion 21CWS of the block piece 21. An intermediate block piece width direction lower recess (not shown) to be joined is formed.

  On the side facing the rear edge block piece 21 of the intermediate block piece 22, there is an upper recess 22 </ b> CWF in the intermediate block width direction. Further, a seating step portion 22CWS is formed on the rear edge block piece 23 side of the intermediate block piece 22, and a lower projection portion 22CWM2 in the intermediate block piece width direction is formed projecting toward the rear edge block piece 23 side of the seating step portion 22CWS. ing. Moreover, the width direction upper bank 22CLB1 and the width direction lower bank 22CLB2 which are extended in the width direction are formed in one of the vertical side surfaces of the intermediate block piece 22. Furthermore, the width direction upper bank 22CLD1 and the width direction lower bank 22CLD2 which are extended in the width direction are formed in the other of the vertical side surface of the intermediate block piece 22.

  On the side facing the intermediate block piece 22 of the trailing edge block piece 23, there is an upward convex portion 23CWM1 in the trailing edge block width direction. Further, the intermediate block piece 22 in the intermediate block width direction downward projection 22CWM2 is joined to the reverse seat step (not shown) retracted so as to mesh with the seat step 22CWS of the intermediate block piece 22 of the trailing edge block piece 23. The rear edge block piece width direction lower recessed part (not shown) is formed.

  A width direction upper ridge 23CLB1 and a width direction lower ridge 23CLB2 extending in the width direction are formed on one of the longitudinal side surfaces of the trailing edge block piece 23. Furthermore, the width direction upper bank 23CLD1 and the width direction lower bank 23CLD2 which are extended in the width direction are formed in the other of the vertical side surface of the trailing edge block piece 23.

  The front edge block piece 21, the intermediate block piece 22, and the rear edge block piece 23 are joined to each other by combining the upper and lower concave portions, the upper and lower convex portions, the upper and lower bank, and the upper and lower grooves as shown in FIG. Forming divided blocks. In the present example, the upper and lower concave portions and the upper and lower convex portions joining the leading edge block piece 21, the intermediate block piece 22 and the trailing edge block piece 23 are joined by the traditional Japanese stool dovetail joint technique. Instead, a simple dovetail joint, or other wood joining technique such as sickle joint or sitting sickle joint, that is, a joining method using a material different from a block piece such as a nail or a metal fitting is not used.

  It is preferable that an adhesive is interposed between the joining surfaces of the leading edge block piece 21, the intermediate block piece 22, and the trailing edge piece 23.

  By using the above-described joining, a single blade body can be formed by a large number of divided blocks. Then, by covering the surface of the blade body with the outer cover of the FRP described in each of the above embodiments, a lightweight, tough and highly rigid blade can be obtained.

  FIG. 17 is an explanatory diagram of the overall shape of the wind power generator according to the present invention, where FIG. 17 (a) shows the front and FIG. 17 (b) shows the side. In this wind power generator, three blades 1 and a nacelle 50 are mounted on the top of the tower 100 described above. The blade 1 is attached to the hub 30 so as to rotate with an elevation angle of θ degrees (for example, 4 degrees) with respect to the axis (vertical line) of the tower 100. The setting of the angle θ is for avoiding the blade 1 from coming into contact with the tower main body 103 due to a strong wind, and is set in consideration of the bending characteristics of the blade, and is generally about 4 ° to 7 °.

  The tower 100 according to this embodiment includes a tower body 103 including a lower structure 104 and an upper structure 105 on a foundation 101 and a tower base 102. The height of the lower structure 104 and the upper structure 105 is 100 meters, and the total height including the foundation 101 and the tower base 102 is about 108 meters. The turning radius of the blade 1 is 60 meters, and the lower point diameter is 120 meters. The nacelle 50 contains a generator and, if necessary, a gear box, a control box, an elevator, and the like.

  Inside the tower is a multi-function automatic device that includes a shaft that reaches the nacelle from the base part along its longitudinal direction (height direction) and provides automatic replacement of parts, transportation of maintenance workers, and cargo handling functions ( Robot) is installed. The electric power generated by the generator is taken out from the base through the shaft.

  As described above, according to the present invention, the divided blocks for constituting the tower are divided into sizes that can be easily loaded and transported by truck, and those that can be easily transported to the wind farm. Therefore, it is difficult to depend on the skills of on-site assembly workers, so the assembly quality can be made uniform, and the unit block itself can be connected to the block with external force strength, weather resistance, low noise, durability, etc. An improved tower can be configured, and by using this tower, it is possible to provide a low-cost and easy-to-maintain wind power generator.

  The joint structures described in the above embodiments can be combined with each other. Needless to say, the configuration of the divided blocks of the second and third embodiments can also be applied to the curved blade shown in the first embodiment.

DESCRIPTION OF SYMBOLS 1 ... Blade 10 ... Blade body 11 ... Base 11A ... Hub connection block 11B ... Hub connection block-intermediate block connection 11P1 ... Hub connection block first piece 11P1 ... Hub connection block second piece 11P1 .. Hub connection block third piece 12 .. Intermediate part 13.. Tip part 14.. End plate 15.
16. · Adhesive 17 ·· Fiber (silicon carbide fiber), alumina fiber, glass fiber, carbon fiber, etc.)
20 .. Divided block 20a .. Divided block upper half 20b .. Divided block lower half 21 .. Leading edge block piece 21AWF .. Leading edge block width direction recess 21AWM .. Leading edge block vertical protruding part 21ALF. Block longitudinal recess 21ALM ··· Leading edge block longitudinal projection 21BWF · · Leading edge block width recessing 21BLM · · Leading edge block longitudinal shaft 21BLM · · Leading edge block longitudinal shaft receiving hole 21CWF ··· Leading edge block width Direction upper concave portion 21CWM ··· Front edge block width direction lower convex portion 21CWS · · Front edge block width direction seat step 21CLB1 · · Front edge block width direction upper ridge 21CLB2 · · Front edge block width direction lower ridge 21CLD1 ··· Front edge block width direction upper groove 21 CLD 2 ..Front edge block width direction lower groove 22 ..Intermediate block piece 22 A F. ・ Intermediate block width direction recess 22AWM ・ ・ Intermediate block width direction protrusion 22ALF ・ ・ Intermediate block length direction recess 22AWF ・ ・ Intermediate block width direction recess 22ALM ・ ・ Intermediate block length direction protrusion 22BWM ・ ・ Intermediate block width direction protrusion Portion 22BWF ・ ・ Intermediate block width direction recess 22BLM ・ ・ Intermediate block longitudinal shaft 22BLM ・ ・ Intermediate block longitudinal shaft receiving hole 22CWM1 ・ ・ Intermediate block width direction upward protrusion 22CWF ・ ・ Intermediate block width direction upper recess 22CWM2 ・ ・ Intermediate Block width direction lower convex portion 22CWS ··· Intermediate block width direction seat step 22CLB1 · · · Intermediate block width direction upper ridge 22CLB2 · · Intermediate block width direction lower ridge 22CLD1 · · Intermediate block width direction upper groove 22CLD2 · · Intermediate block width Direction lower groove 23 ・ ・ Rear edge block pin 23ALF ·· Rear edge block vertical recess 23AWM ·· Rear edge block width protrusion 23ALM ·· Rear edge block protrusion 23ALM ·· Rear edge block protrusion 23BWM ·· Rear edge block width protrusion 23BLM ·· Rear edge block longitudinal shaft 23BLM ·· Rear edge block longitudinal shaft receiving hole 23CWM1 ·· Rear edge block width direction upward projection 23CLB1 ·· Rear edge block width direction upper ridge 23CLB2 ·· Rear edge block width direction Lower bank 24 ・ ・ Bridge 25 ・ ・ Bridge 26 ・ ・ Adhesive 27 ・ ・ Ditch
28 .. Bridging member 30 .. Rod-shaped grounding member 40.. Hub 50.. Nacelle 100. Tower 103.

Claims (19)

A wind power generator having a nacelle containing a horizontal shaft provided at the top of a tower, a turbine blade attached to one end of the horizontal shaft, and a power generation facility including a generator connected to the other end of the horizontal shaft. There,
The turbine blade is composed of a plurality of blades and a hub for fixing the plurality of blades to one end of the horizontal shaft,
Each of the blade bodies is formed of a resin material, and a divided block obtained by joining a block piece divided in the width direction of the blade and a leading edge block piece is made of the material itself constituting the blade along the longitudinal direction of the blade. A wind power generator characterized in that the entire surface of a blade body joined with a large number of divided blocks joined together by joint means attached to the block piece in shape is covered with a fiber-reinforced plastic skin. The wind power generator according to claim 1,
The wind power generator according to claim 1, wherein the joint joined to the block piece in the shape of the material constituting the blade is a joint using a wooden joint structure. The wind power generator according to claim 1,
The wind power generator characterized in that the means for joining a plurality of the divided blocks in the longitudinal direction of the blade is the wooden joint structure. In the wind power generator according to claim 2 or 3,
A wind power generator, wherein the block pieces and the divided blocks are joined in a staggered arrangement alternately along the longitudinal direction of the blades. The wind power generator according to any one of claims 2 to 4,
The wind power generator according to claim 1, wherein the wooden joint structure is provided as a bridge between a joint between the block pieces and a joint between the divided blocks. The wind power generator according to claim 5,
The wooden joint structure provided by bridging the joint between the block pieces and the joint between the divided blocks is the same material as the block piece in the concave part of the wooden joint structure formed on both sides of the joint. A wind power generator characterized by being connected by driving a bridge having a shape corresponding to the shape of the recess.
Wind generator. The wind power generator according to claim 1,
The blade is composed of a base portion, an intermediate portion, and a tip portion, and the shapes of the base portion, the intermediate portion, and the tip portion are different from each other according to the shape of the blade,
The number of block pieces which comprise the said base part, the said intermediate part, and the said front-end | tip part differs, The wind power generator characterized by the above-mentioned. The wind power generator according to claim 1,
The wind power generator according to claim 1, wherein the block piece has a shape and a shape corresponding to shapes of the base portion, the intermediate portion, and the tip portion of the blade. The wind power generator according to claim 1,
The said block piece is comprised by bonding the front side division piece and the back side division piece, The wind power generator characterized by the above-mentioned. The wind power generator according to claim 9,
A wind power generator characterized in that an adhesive is interposed in a joint portion between the front-side divided piece, a back-side divided piece, and the block piece and a joint portion between the divided blocks. The wind power generator according to claim 1,
The wind power generator according to claim 1, wherein the blade is curved in a gentle convex shape in the rotation direction and gradually narrows from the base side along the tip. The wind power generator according to claim 1,
The blade has the same width from the intermediate portion to the tip portion. The wind power generator according to claim 1,
A wind power generator comprising a rod-shaped grounding member at a tip of the blade in a tangential direction of a rotation circle drawn by the tip of the blade. The wind power generator according to claim 1,
A wind power generator characterized in that a grounding end plate having a predetermined angle with respect to a plane intersecting the rotation plane including a tangent of a rotation circle drawn by the tip of the blade is provided at the tip portion of the blade. . The wind power generator according to claim 1,
The wind power generator characterized in that the resin material constituting the blade body is carbon fiber reinforced plastic. The wind power generator according to claim 1,
The wind power generator characterized in that the resin material constituting the blade body is a glass fiber reinforced plastic. The wind power generator according to claim 1,
A wind power generator characterized in that the resin material constituting the blade body is a styrene resin or urethane resin having a reinforced coating film on the surface, or a composite material thereof. The wind power generator according to any one of claims 15 to 17,
The wind power generator characterized in that the fiber reinforced plastic constituting the outer skin is a glass fiber reinforced plastic. The wind power generator according to any one of claims 15 to 17,
A wind power generator characterized in that the fiber reinforced plastic constituting the outer skin is a carbon fiber reinforced plastic.

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